// https://syzkaller.appspot.com/bug?id=777eaa009d91389cee95ff9f272217c20b9c6580 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif #ifndef __NR_pwritev2 #define __NR_pwritev2 328 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } //% This code is derived from puff.{c,h}, found in the zlib development. The //% original files come with the following copyright notice: //% Copyright (C) 2002-2013 Mark Adler, all rights reserved //% version 2.3, 21 Jan 2013 //% This software is provided 'as-is', without any express or implied //% warranty. In no event will the author be held liable for any damages //% arising from the use of this software. //% Permission is granted to anyone to use this software for any purpose, //% including commercial applications, and to alter it and redistribute it //% freely, subject to the following restrictions: //% 1. The origin of this software must not be misrepresented; you must not //% claim that you wrote the original software. If you use this software //% in a product, an acknowledgment in the product documentation would be //% appreciated but is not required. //% 2. Altered source versions must be plainly marked as such, and must not be //% misrepresented as being the original software. //% 3. This notice may not be removed or altered from any source distribution. //% Mark Adler madler@alumni.caltech.edu //% BEGIN CODE DERIVED FROM puff.{c,h} #define MAXBITS 15 #define MAXLCODES 286 #define MAXDCODES 30 #define MAXCODES (MAXLCODES + MAXDCODES) #define FIXLCODES 288 struct puff_state { unsigned char* out; unsigned long outlen; unsigned long outcnt; const unsigned char* in; unsigned long inlen; unsigned long incnt; int bitbuf; int bitcnt; jmp_buf env; }; static int puff_bits(struct puff_state* s, int need) { long val = s->bitbuf; while (s->bitcnt < need) { if (s->incnt == s->inlen) longjmp(s->env, 1); val |= (long)(s->in[s->incnt++]) << s->bitcnt; s->bitcnt += 8; } s->bitbuf = (int)(val >> need); s->bitcnt -= need; return (int)(val & ((1L << need) - 1)); } static int puff_stored(struct puff_state* s) { s->bitbuf = 0; s->bitcnt = 0; if (s->incnt + 4 > s->inlen) return 2; unsigned len = s->in[s->incnt++]; len |= s->in[s->incnt++] << 8; if (s->in[s->incnt++] != (~len & 0xff) || s->in[s->incnt++] != ((~len >> 8) & 0xff)) return -2; if (s->incnt + len > s->inlen) return 2; if (s->outcnt + len > s->outlen) return 1; for (; len--; s->outcnt++, s->incnt++) { if (s->in[s->incnt]) s->out[s->outcnt] = s->in[s->incnt]; } return 0; } struct puff_huffman { short* count; short* symbol; }; static int puff_decode(struct puff_state* s, const struct puff_huffman* h) { int first = 0; int index = 0; int bitbuf = s->bitbuf; int left = s->bitcnt; int code = first = index = 0; int len = 1; short* next = h->count + 1; while (1) { while (left--) { code |= bitbuf & 1; bitbuf >>= 1; int count = *next++; if (code - count < first) { s->bitbuf = bitbuf; s->bitcnt = (s->bitcnt - len) & 7; return h->symbol[index + (code - first)]; } index += count; first += count; first <<= 1; code <<= 1; len++; } left = (MAXBITS + 1) - len; if (left == 0) break; if (s->incnt == s->inlen) longjmp(s->env, 1); bitbuf = s->in[s->incnt++]; if (left > 8) left = 8; } return -10; } static int puff_construct(struct puff_huffman* h, const short* length, int n) { int len; for (len = 0; len <= MAXBITS; len++) h->count[len] = 0; int symbol; for (symbol = 0; symbol < n; symbol++) (h->count[length[symbol]])++; if (h->count[0] == n) return 0; int left = 1; for (len = 1; len <= MAXBITS; len++) { left <<= 1; left -= h->count[len]; if (left < 0) return left; } short offs[MAXBITS + 1]; offs[1] = 0; for (len = 1; len < MAXBITS; len++) offs[len + 1] = offs[len] + h->count[len]; for (symbol = 0; symbol < n; symbol++) if (length[symbol] != 0) h->symbol[offs[length[symbol]]++] = symbol; return left; } static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode, const struct puff_huffman* distcode) { static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258}; static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0}; static const short dists[30] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; int symbol; do { symbol = puff_decode(s, lencode); if (symbol < 0) return symbol; if (symbol < 256) { if (s->outcnt == s->outlen) return 1; if (symbol) s->out[s->outcnt] = symbol; s->outcnt++; } else if (symbol > 256) { symbol -= 257; if (symbol >= 29) return -10; int len = lens[symbol] + puff_bits(s, lext[symbol]); symbol = puff_decode(s, distcode); if (symbol < 0) return symbol; unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]); if (dist > s->outcnt) return -11; if (s->outcnt + len > s->outlen) return 1; while (len--) { if (dist <= s->outcnt && s->out[s->outcnt - dist]) s->out[s->outcnt] = s->out[s->outcnt - dist]; s->outcnt++; } } } while (symbol != 256); return 0; } static int puff_fixed(struct puff_state* s) { static int virgin = 1; static short lencnt[MAXBITS + 1], lensym[FIXLCODES]; static short distcnt[MAXBITS + 1], distsym[MAXDCODES]; static struct puff_huffman lencode, distcode; if (virgin) { lencode.count = lencnt; lencode.symbol = lensym; distcode.count = distcnt; distcode.symbol = distsym; short lengths[FIXLCODES]; int symbol; for (symbol = 0; symbol < 144; symbol++) lengths[symbol] = 8; for (; symbol < 256; symbol++) lengths[symbol] = 9; for (; symbol < 280; symbol++) lengths[symbol] = 7; for (; symbol < FIXLCODES; symbol++) lengths[symbol] = 8; puff_construct(&lencode, lengths, FIXLCODES); for (symbol = 0; symbol < MAXDCODES; symbol++) lengths[symbol] = 5; puff_construct(&distcode, lengths, MAXDCODES); virgin = 0; } return puff_codes(s, &lencode, &distcode); } static int puff_dynamic(struct puff_state* s) { static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; int nlen = puff_bits(s, 5) + 257; int ndist = puff_bits(s, 5) + 1; int ncode = puff_bits(s, 4) + 4; if (nlen > MAXLCODES || ndist > MAXDCODES) return -3; short lengths[MAXCODES]; int index; for (index = 0; index < ncode; index++) lengths[order[index]] = puff_bits(s, 3); for (; index < 19; index++) lengths[order[index]] = 0; short lencnt[MAXBITS + 1], lensym[MAXLCODES]; struct puff_huffman lencode = {lencnt, lensym}; int err = puff_construct(&lencode, lengths, 19); if (err != 0) return -4; index = 0; while (index < nlen + ndist) { int symbol; int len; symbol = puff_decode(s, &lencode); if (symbol < 0) return symbol; if (symbol < 16) lengths[index++] = symbol; else { len = 0; if (symbol == 16) { if (index == 0) return -5; len = lengths[index - 1]; symbol = 3 + puff_bits(s, 2); } else if (symbol == 17) symbol = 3 + puff_bits(s, 3); else symbol = 11 + puff_bits(s, 7); if (index + symbol > nlen + ndist) return -6; while (symbol--) lengths[index++] = len; } } if (lengths[256] == 0) return -9; err = puff_construct(&lencode, lengths, nlen); if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1])) return -7; short distcnt[MAXBITS + 1], distsym[MAXDCODES]; struct puff_huffman distcode = {distcnt, distsym}; err = puff_construct(&distcode, lengths + nlen, ndist); if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1])) return -8; return puff_codes(s, &lencode, &distcode); } static int puff(unsigned char* dest, unsigned long* destlen, const unsigned char* source, unsigned long sourcelen) { struct puff_state s = { .out = dest, .outlen = *destlen, .outcnt = 0, .in = source, .inlen = sourcelen, .incnt = 0, .bitbuf = 0, .bitcnt = 0, }; int err; if (setjmp(s.env) != 0) err = 2; else { int last; do { last = puff_bits(&s, 1); int type = puff_bits(&s, 2); err = type == 0 ? puff_stored(&s) : (type == 1 ? puff_fixed(&s) : (type == 2 ? puff_dynamic(&s) : -1)); if (err != 0) break; } while (!last); } *destlen = s.outcnt; return err; } //% END CODE DERIVED FROM puff.{c,h} #define ZLIB_HEADER_WIDTH 2 static int puff_zlib_to_file(const unsigned char* source, unsigned long sourcelen, int dest_fd) { if (sourcelen < ZLIB_HEADER_WIDTH) return 0; source += ZLIB_HEADER_WIDTH; sourcelen -= ZLIB_HEADER_WIDTH; const unsigned long max_destlen = 132 << 20; void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); if (ret == MAP_FAILED) return -1; unsigned char* dest = (unsigned char*)ret; unsigned long destlen = max_destlen; int err = puff(dest, &destlen, source, sourcelen); if (err) { munmap(dest, max_destlen); errno = -err; return -1; } if (write(dest_fd, dest, destlen) != (ssize_t)destlen) { munmap(dest, max_destlen); return -1; } return munmap(dest, max_destlen); } static int setup_loop_device(unsigned char* data, unsigned long size, const char* loopname, int* loopfd_p) { int err = 0, loopfd = -1; int memfd = syscall(__NR_memfd_create, "syzkaller", 0); if (memfd == -1) { err = errno; goto error; } if (puff_zlib_to_file(data, size, memfd)) { err = errno; goto error_close_memfd; } loopfd = open(loopname, O_RDWR); if (loopfd == -1) { err = errno; goto error_close_memfd; } if (ioctl(loopfd, LOOP_SET_FD, memfd)) { if (errno != EBUSY) { err = errno; goto error_close_loop; } ioctl(loopfd, LOOP_CLR_FD, 0); usleep(1000); if (ioctl(loopfd, LOOP_SET_FD, memfd)) { err = errno; goto error_close_loop; } } close(memfd); *loopfd_p = loopfd; return 0; error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return -1; } static void reset_loop_device(const char* loopname) { int loopfd = open(loopname, O_RDWR); if (loopfd == -1) { return; } if (ioctl(loopfd, LOOP_CLR_FD, 0)) { } close(loopfd); } static long syz_mount_image(volatile long fsarg, volatile long dir, volatile long flags, volatile long optsarg, volatile long change_dir, volatile unsigned long size, volatile long image) { unsigned char* data = (unsigned char*)image; int res = -1, err = 0, need_loop_device = !!size; char* mount_opts = (char*)optsarg; char* target = (char*)dir; char* fs = (char*)fsarg; char* source = NULL; char loopname[64]; if (need_loop_device) { int loopfd; memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; close(loopfd); source = loopname; } mkdir(target, 0777); char opts[256]; memset(opts, 0, sizeof(opts)); if (strlen(mount_opts) > (sizeof(opts) - 32)) { } strncpy(opts, mount_opts, sizeof(opts) - 32); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { bool has_remount_ro = false; char* remount_ro_start = strstr(opts, "errors=remount-ro"); if (remount_ro_start != NULL) { char after = *(remount_ro_start + strlen("errors=remount-ro")); char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1); has_remount_ro = ((before == '\0' || before == ',') && (after == '\0' || after == ',')); } if (strstr(opts, "errors=panic") || !has_remount_ro) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } res = mount(source, target, fs, flags, opts); if (res == -1) { err = errno; goto error_clear_loop; } res = open(target, O_RDONLY | O_DIRECTORY); if (res == -1) { err = errno; goto error_clear_loop; } if (change_dir) { res = chdir(target); if (res == -1) { err = errno; } } error_clear_loop: if (need_loop_device) reset_loop_device(loopname); errno = err; return res; } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void reset_loop() { char buf[64]; snprintf(buf, sizeof(buf), "/dev/loop%llu", procid); int loopfd = open(buf, O_RDWR); if (loopfd != -1) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } memcpy((void*)0x20000200, "exfat\000", 6); memcpy((void*)0x20000a00, "./file0\000", 8); memcpy( (void*)0x20001540, "\x78\x9c\xec\xdc\x09\xd8\x8d\x55\xd7\x38\xf0\xb5\xf6\xde\xb7\x1e\x92\x4e" "\x92\x84\xbd\xf6\xba\x39\xc9\xb0\x49\x92\x0c\x49\x32\x24\x49\x92\xbc\x92" "\x29\x21\x24\x49\x12\x12\x0f\x99\x92\x24\xc9\x3c\x25\x99\x43\x32\x85\x64" "\x9e\xa7\xcc\x49\xf2\x4a\x92\x24\x24\x24\xd9\xff\x4b\x71\xe9\xfd\x7a\xbf" "\xaf\xf7\xff\x4e\xde\xef\x7b\xd6\xef\xba\xee\xeb\xd9\xeb\xb9\xcf\xda\x67" "\xdd\x67\xdd\xe7\xdc\xc3\xf5\x3c\xe7\x9b\xb6\xfd\x2a\xd4\xaa\x58\xb6\x06" "\x33\xc3\x3f\x04\x7f\xfd\x91\x0a\x00\x29\x00\xd0\x0b\x00\xae\x06\x80\x08" "\x00\x8a\x66\x2e\x9a\xf9\xfc\xfa\xf4\x1a\x53\xff\xb1\x27\x11\xff\x5c\x0f" 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"\x9d\xc4\xb8\xc4\xf8\xc4\x84\xc4\xc4\xc4\xa4\xc4\xe4\xc4\x94\xc4\xbb\x89" "\xa9\x89\x69\x89\xe9\x89\xf7\x12\x33\x12\xef\x27\x66\x26\x66\x25\x66\x27" "\xe6\x24\xe6\x26\x3e\x48\xcc\x4b\xcc\x4f\x2c\x48\x7c\x98\x58\x98\xf8\x28" "\xb1\x28\xb1\x38\xb1\x24\xb1\x34\xb1\x2c\xb1\x3c\x11\x42\x8e\xcd\x71\xc8" "\x15\x72\x87\x64\xb8\x31\xe4\x09\x37\x85\xbc\x21\x5f\xc8\x1f\x0a\x04\x1f" "\x0a\x86\x42\xe1\xe6\x50\x38\xdc\x12\x8a\x84\x5b\x43\xd1\x70\x5b\x28\x16" "\x6e\x0f\xc5\x43\x89\x50\x32\x3c\x1a\xea\x84\xba\xa1\x5e\xa8\x1f\x1a\x84" "\xc7\x42\xc3\xf0\x78\x68\x14\x1a\x87\x26\xe1\x89\xd0\x34\x34\x0b\xcd\xc3" "\x93\xa1\x45\x78\x2a\xb4\x0c\x4f\x87\x56\xe1\x99\xd0\x3a\x3c\x1b\xda\x84" "\xe7\x42\xdb\xf0\x7c\x68\x17\xda\x87\x0e\xe1\x85\xd0\x31\xbc\x18\x3a\x85" "\xce\x21\x35\x74\x09\x5d\xc3\x4b\xa1\x5b\xe8\x1e\x7a\x84\x9e\xa1\x57\x78" "\x39\xf4\x0e\xaf\x84\x3e\xe1\xd5\xd0\x37\xbc\x16\xfa\x85\xd7\x43\xff\xf0" "\x46\x18\x10\xde\x0c\x03\xc3\xa0\x30\x38\x0c\x09\x43\xc3\xb0\x30\x3c\x8c" "\x08\x23\xc3\xa8\x30\x3a\xbc\x15\xc6\x84\xb7\xc3\xd8\xf0\x4e\x18\x17\xc6" "\x87\x09\x61\x62\x98\x14\x26\x87\x29\xe1\xdd\x30\x35\x4c\x0b\xd3\xc3\x7b" "\x61\x46\x78\x3f\xcc\x0c\xb3\xc2\xec\x30\x27\xcc\x0d\x1f\x84\x79\x61\x7e" "\x58\x10\x3e\x0c\x0b\xc3\x47\x61\x51\x58\x1c\x96\x84\xa5\x61\x59\x58\x1e" "\x56\x84\x95\x61\x55\xc0\x0b\xef\x95\xf5\x61\x43\xd8\x18\x36\x85\x8f\xc3" "\xe6\xb0\x25\x6c\x0d\xdb\xc2\xf6\xb0\x23\xec\x0c\x9f\x84\x5d\xe1\xd3\xb0" "\x3b\x7c\x16\xf6\x84\xcf\xc3\xde\xf0\xe7\xb0\x2f\x7c\x11\xf6\x87\x2f\xc3" "\x81\xf0\x55\x38\x18\xbe\x0e\x87\xc2\x37\xe1\x70\xf8\x36\x1c\x09\xdf\x85" "\xa3\xe1\x58\x38\x1e\xbe\x0f\x27\xc2\x0f\xe1\x64\x38\x15\x4e\x87\x1f\xc3" "\x99\xf0\x53\x38\x1b\x7e\x0e\xe7\xe4\x7f\xd6\x84\x10\x42\x08\x21\xfe\x26" "\x63\xfe\x60\x7d\x97\xbf\xf2\x3b\x75\x61\x39\xaf\x2b\x00\x5c\xb5\xe5\x86" "\x03\xbf\x5d\xaf\x01\x60\x5d\xd6\x5f\xc7\xdd\x55\xf6\xa6\x09\x00\x78\xaa" "\x73\xdb\x87\x2f\x2e\xe5\xca\xa5\xa6\x5e\xb8\xf4\x86\x45\x1a\xa2\xdc\xb3" "\x00\x20\x01\xe9\x2e\xe6\xff\xf2\xfd\x03\x89\x5f\xc7\x8b\xa1\x09\x34\x83" "\x16\xd0\x18\x0a\xff\xd5\xfa\xba\xab\xf6\x67\xf8\x0f\xe6\x4f\xde\x06\x90" "\xe1\x37\x39\x29\x70\x29\x0e\x9d\x2f\xce\x7f\xcb\x7f\x33\xff\xb0\x19\x7f" "\x38\xff\x2c\x80\xbc\xb9\x2f\xe5\x9c\xbf\x42\xbc\x18\x5f\xaa\xbf\xc8\x7f" "\x33\xff\xf5\x0d\xff\x60\xfe\xf4\x5f\x8c\x06\x68\xf4\x9b\x9c\x8c\x70\x29" "\xbe\x34\x7f\x21\x78\x1c\x9e\x86\x16\x7f\xf1\x48\x21\x84\x10\x42\x08\x21" "\x84\x10\xe2\x57\xdd\x55\xc9\xd6\x7f\x74\x7d\x7b\xfe\xfa\x3c\xbb\xb9\x94" "\x73\x05\x5c\x8a\x17\x03\xfe\x8f\xd7\xe7\x42\x08\x21\x84\x10\x42\x08\x21" "\x84\xb8\xfc\x9e\x6d\xdf\xe1\xc9\xc7\x5a\xb4\x68\xdc\x3a\x4d\x0e\xba\xfc" "\xbd\xe9\x1a\x2e\x7f\xf1\xff\xce\x81\xbe\xb0\xbb\xfc\x66\x55\xfe\x62\xf0" "\x7f\xe5\x45\xb8\xf8\xc7\x2c\xff\x29\xf5\xfc\x47\x0c\x2e\xe3\x87\x92\x10" "\x42\x08\x21\x84\x10\xe2\x5f\xe2\xd2\x49\xff\xe5\xae\x44\x08\x21\x84\x10" "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21" "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x48\xbb" "\xfe\x1d\x5f\x27\x76\xb9\xb7\x51\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42" "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84" "\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08" "\x21\x84\xb8\xdc\xfe\x5f\x00\x00\x00\xff\xff\x18\xf8\x1b\x48", 5379); syz_mount_image(/*fs=*/0x20000200, /*dir=*/0x20000a00, /*flags=MS_NOEXEC*/ 8, /*opts=*/0x20000080, /*chdir=*/6, /*size=*/0x1503, /*img=*/0x20001540); memcpy((void*)0x20000040, "./file0\000", 8); syscall(__NR_chdir, /*dir=*/0x20000040ul); memcpy((void*)0x200005c0, "./bus\000", 6); res = syscall( __NR_open, /*file=*/0x200005c0ul, /*flags=O_NONBLOCK|O_NOFOLLOW|O_NOATIME|O_DIRECT|O_CREAT|0x2*/ 0x64842ul, /*mode=S_IWGRP*/ 0x10ul); if (res != -1) r[0] = res; *(uint64_t*)0x20000240 = 0x20000000; memset((void*)0x20000000, 133, 1); *(uint64_t*)0x20000248 = 0xfea7; syscall(__NR_pwritev2, /*fd=*/r[0], /*vec=*/0x20000240ul, /*vlen=*/1ul, /*off_low=*/0x30, /*off_high=*/0, /*flags=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }